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參數(shù)資料
| 型號： | IMISC643AYB |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封裝： | SSOP-48 |
| 文件頁數(shù)： | 11/12頁 |
| 文件大小： | 138K |
| 代理商： | IMISC643AYB |
SC643
I
2C Clock Generator for 3 DIMM, Pentium
II Designs
Approved Product
INTERNATIONAL MICROCIRCUITS, INC. 525 LOS COCHES ST.
Rev.1.6
6/20/97
MILPITAS, CA 95035. TEL: 408-263-6300. FAX 408-263-6571
Page 8 of 12
MAXIMUM RATINGS
Voltage Relative to VSS:
-0.3V
Voltage Relative to VDD:
0.3V
Storage Temperature:
-65C to + 150C
Ambient Temperature:
-55C to +125C
Maximum Power Supply:
7V
This device contains circuitry to protect the inputs
against damage due to high static voltages or electric
field; however, precautions should be taken to avoid
application of any voltage higher than the maximum
rated voltages to this circuit. For proper operation, Vin
and Vout should be constrained to the range:
VSS<(Vin or Vout)<VDD
Unused inputs must always be tied to an appropriate
logic voltage level (either VSS or VDD).
ELECTRICAL CHARACTERISTICS
Characteristic
Symbol
Min
Typ
Max
Units
Conditions
Input Low Voltage
VIL
-
0.8
Vdc
-
Input High Voltage
VIH
2.0
-
Vdc
-
Input Low Current
IIL
-66
A
Input High Current
IIH
5
A
Tri-State leakage Current
Ioz
-
10
A
Dynamic Supply Current
Idd
-
116
mA
CPU = 66.6 MHz, PCI = 33.3 Mhz
Unloaded
Static Supply Current
Isdd
-
13
A
-
Short Circuit Current
ISC
25
-
mA
1 output at a time - 30 seconds
VDD = VDDQ3 =3.3V
±5%, VDDQ2 = 2.5 + 5%, TA = 0C to +70C
SWITCHING CHARACTERISTICS
Characteristic
Symbol
Min
Typ
Max
Units
Conditions
Output Duty Cycle
-
45
50
55
%
Measured at 1.5V
CPU/SDRAM to PCI Offset
tOFF
1
-
4
ns
15 pf Load Measured at 1.5V
Skew (CPU-CPU), (PCI-
PCI), (SDRAM-SDRAM)
tSKEW1
-
250
ps
15 pf Load Measured at 1.5V
Skew (CPU-SDRAM)
tSKEW2
-
500
ps
15 pf Load Measured at 1.5V
Period Adjacent Cycles
P
-
+250
ps
-
Jitter Spectrum
20 dB
Bandwidth from Center
BWJ
500
KHz
Overshoot/Undershoot
Beyond Power Rails
Vover
-
1.5
V
22 ohms @ source of 8 inch PCB run
to 15 pf load
Ring Back Exclusion
VRBE
0.7
2.1
V
note1
VDD = VDDQ3 =3.3V
±5%, VDDQ2 =2.5 + 5%, TA = 0C to +70C
note 1: Ring Back must not enter this range.
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